Noise is defined as an undesirable, disruptive sound or a sound that is over 80 dB.

When the average noise level reaches more than 80 dB during the work day.

Hearing protection must always be worn if the average noise level is over 85 dB during the working day.

This is the single number rating of a hearing protector. E.g.: SNR 30 = the hearing protector reduces the volume by an average of 30 dB when worn correctly.

Examples of places with noise levels above 80 dB(A)

• Airports    120–150 dB(A)
• Mines                       115–130 dB(A)
• Concrete industry            100–115 dB(A)
• Roadworks                  100–110 dB(A)
• Ship's engine room      100–110 dB(A)
• Heavy tractor                90–105 dB(A)
• Sheet metal shop                   90–105 dB(A)
• General workshop noise  90–100 dB(A)
• Power tools             85–100 dB(A)
• Preschools                     80–100 dB(A)
• Highly trafficked road            80–100 dB(A)